<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .container {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
      }
      .item {
        width: 100px;
        height: 100px;
      }
      .item:nth-child(1) {
        border: 5px solid #1c6ea4;
      }
      .item:nth-child(2) {
        border: 5px double #1c6ea4;
      }
      .item:nth-child(3) {
        border: 5px dashed #1c6ea4;
      }
      .item:nth-child(4) {
        border: 5px dotted #1c6ea4;
      }
      .item:nth-child(5) {
        border: 20px groove #1c6ea4;
      }
      .item:nth-child(6) {
        border: 20px ridge #1c6ea4;
      }
      .item:nth-child(7) {
        border: 20px inset #1c6ea4;
      }
      .item:nth-child(8) {
        border: 20px outset #1c6ea4;
      }
    </style>
  </head>
  <body>
    <div class="container">
      <div class="item"></div>
      <div class="item"></div>
      <div class="item"></div>
      <div class="item"></div>
      <div class="item"></div>
      <div class="item"></div>
      <div class="item"></div>
      <div class="item"></div>
    </div>
  </body>
</html>
